0025629: Visualization, AIS_InteractiveContext - code clean up

Drop confusing method AIS_InteractiveContext::Clear() which is the same as ::Remove().
AIS_InteractiveContext::Display() - fix double viewer update on first display of presentation.
AIS_InteractiveContext::DisplayedObjects() - fix objects retrieval from local contexts.
AIS_InteractiveContext::Load() - do not bind object twice.

Drop code blocks for debug output.
Code clean up.

src/AIS/AIS_InteractiveContext.cdl

@@ -268,15 +268,6 @@ is
 -- inWhichLocal gives the local context in which anIObj
 -- is displayed. By default, the index -1 refers to the last
 -- Local Context opened.
- 
-    Clear(me : mutable;
-    	  aniobj         : InteractiveObject from AIS;
-	  updateviewer   : Boolean from Standard = Standard_True);
----Purpose: Removes the interactive object aniobj from all viewers.
--- If a local context is open and if updateviewer equals
--- Standard_False, the presentation of the Interactive
--- Object activates the selection mode; the object is
--- displayed but no viewer will be updated.
 
     ClearPrs( me           :mutable;
     	      aniobj       : InteractiveObject from AIS;
@@ -2046,6 +2037,16 @@ is
     PurgeViewer(me:mutable;Vwr:Viewer from V3d) 
     returns Integer from Standard is static private;
 
+    redisplayPrsModes (me                : mutable;
+                       theIObj           : InteractiveObject from AIS;
+                       theToUpdateViewer : Boolean from Standard = Standard_True) is static private;
+   ---Purpose: UNKNOWN
+
+    redisplayPrsRecModes (me                : mutable;
+                          theIObj           : InteractiveObject from AIS;
+                          theToUpdateViewer : Boolean from Standard = Standard_True) is static private;
+   ---Purpose: UNKNOWN
+
 fields
 
     myObjects    : DataMapOfIOStatus from AIS;